I have seen this non-booting behavior with USB3 drives connected through a Thunderbolt connection to a Mac that does not support USB3 natively. They can be mounted through TB, but only after the machine has booted, making it impossible to boot off those drives.
I suspect that (making the huge assumption that it is not defective) the Iomega FW chip does not support booting. I just checked this device's customer reviews on Amazon: http://www.amazon.com/Iomega-Companion-External-35130-Silver/product-reviews /B00576T1GG I've never seen such hate for a single piece of equipment. You would probably be better off returning it if you can, or just throwing it away if you cannot. On 5/18/16, 7:29 PM, "Eric Volker" <evol...@gmail.com> wrote: > Well I got the enclosure, but things didn¹t go as planned. I got a deal on an > enclosure that had once been an Iomega Mac Companion. I installed the SSD, > hooked the enclosure up to my Firewire 800 port and it showed up on the > desktop. I installed El Capitan and rebooted, but when the Mac rebooted it > came up from the internal drive not the external one. Holding down Option > while booting showed only the internal drive. The Firewire drive is visible in > the Startup Disk preference panel, but selecting it accomplishes nothing. > Rebooting it just comes up on the internal drive. > > Now for the fun part. It *will* boot if I hook up the drive via USB 2.0. > However, that¹s pretty slow and I got this enclosure for the faster Firewire > 800 port. Another curiosity is that the disk shows up as ³External RAID Media² > in Disk Utility. It is assuredly not RAID, just a single 256GB SSD. Could this > be the problem? > > I¹m in the process of testing the SSD over USB, but results so far are mixed. > Any thoughts on getting Firewire working? -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to imaclist@googlegroups.com To leave this group, send email to imaclist+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist --- You received this message because you are subscribed to the Google Groups "iMac Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to imaclist+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
